Depends on portion size and calories.
For example, Smart Ones' Mac n Cheese is more than a fistful of pasta is about 300 calories so that is a meal to me. I'd have a salad as the side.
I don't consider entrees with macaroni noodles to be "mac n cheese." If you put veggies, cheeses, and other cool stuff in it then that's a delicious pasta meal in the making.